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Didymium xerophilum, a new myxomycete from the tropical Andes

机译：Didymium xerophilum，一种来自热带安第斯山脉的新型粘菌

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摘要

A new species of Didymium (Myxomycetes), D. xerophilum, is described, and some details of its life cycle are provided. The new species was collected during studies of arid areas of Argentina and Peru. It can be distinguished by the persistent funnel-shaped invaginadon of the peridium, the top of which appears as a deep umbilicus in closed sporothecae, and the calcareous hypothallus shared among several sporocarps. This combination of characters, with a circumscissile dehiscence of the sporotheca and a cream stalk packed with rhombic lime crystals, is unknown in other described species. Morphology was examined with scanning electron microscopy and light microscopy, and micrographs of relevant details are included here. Phylogenetic analysis with 18S rDNA sequences of different species of Didymium supports the distinct identity of this new species. Some collections of this myxomycete were made at up to 4600 m, an altitude almost unknown for this group of microorganisms.
机译：描述了Dydiumium（Myxomycetes）的一种新种，D。xerophilum，并提供了其生命周期的一些细节。新物种是在阿根廷和秘鲁干旱地区的研究期间收集的。它的特征可以是蠕动的持续漏斗状的内陷，其顶部在闭合的孢子囊中表现为深脐，而钙质的下丘脑在数个子囊果之间共享。在描述的其他物种中，这种特征的组合以及孢子囊的割裂性开裂和充满菱形石灰晶体的乳脂茎是未知的。用扫描电子显微镜和光学显微镜检查形态，并在此包括相关细节的显微照片。用不同种类的犬齿草的18S rDNA序列进行的系统发育分析支持这种新物种的独特身份。该粘菌菌的一些收集物是在高达4600 m的高度完成的，这一高度对于这组微生物几乎是未知的。

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